USN-4268-1: OpenSMTPD vulnerability

USN-4268-1: OpenSMTPD vulnerability

OpenSMTPD vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 19.10
  • Ubuntu 18.04 LTS

Summary

OpenSMTPD could be made to run programs as root if it received specially
crafted input over the network.

Software Description

  • opensmtpd – secure, reliable, lean, and easy-to configure SMTP server

Details

It was discovered that OpenSMTPD incorrectly verified the sender’s or
receiver’s e-mail addresses under certain conditions. An attacker could use
this vulnerability to execute arbitrary commands as root.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.10
opensmtpd6.0.3p1-6ubuntu0.1
Ubuntu 18.04 LTS
opensmtpd6.0.3p1-1ubuntu0.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

Source: USN-4268-1: OpenSMTPD vulnerability

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